Abstract
Retinal vein occlusion is considered a multifactorial disease with a complex pathogenesis that often reflects locally systemic vascular and hemodynamic disorders. Put in motion by retinal ischemia and subsequent macular edema, macrophages, neutrophils, and microglia participate in the concert of inflammatory responses, in which, among others, several inflammatory mediators such as prostaglandins, IL-1, TNF-alpha, VEGF, and ICAM-1 are involved. Intravitreal triamcinolone injections, the dexamethasone implant, as well as fluocinolone acetonide inserts are currently available for the treatment of macular edema secondary to central or branch retinal vein occlusions. Overall, steroids in RVO offer effective monotherapy and are indeed capable of upgrading other treatment modalities by inducing a comprehensive and long-standing anti-inflammatory and antiangiogenic effect. Additionally sustained-release formulations allow reduction of burden of intravitreal anti-VEGF injections. Intravitreal steroids are also an alternative option for patients not responding to regular anti-VEGF treatments, and there is some evidence that their combination with laser in BRVO may be synergistic.
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Zunz, E., Loewenstein, A. (2015). Intravitreal Steroids for the Treatment of Macular Edema in Retinal Vein Occlusions. In: Augustin, A. (eds) Intravitreal Steroids. Springer, Cham. https://doi.org/10.1007/978-3-319-14487-0_6
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